Functional Description; Power End; Liquid End - ProMinent alpha ALPc 1001 Operating Instructions Manual

Functional description

5 Functional description
5.1

Power end

The cam for the stroke movement is guided in
an eccentric disc. Pumps of this size do not
therefore require conventional return springs –
the suction and pressure stroke are positively
driven.
The stroke length can be adjusted by a latched
slide (9) from 100% to 0 in increments of 10%.
The diaphragm is always deflected from the
neutral centre position, producing a smooth
sinusoidal stroke motion.
5.2

Liquid End

The dosing process is performed as follows:
The diaphragm is pressed into the dosing head;
the pressure in the dosing head closes the suc‐
tion valve and the feed chemical flows through
the discharge valve out of the dosing head. The
diaphragm is now drawn out of the dosing
head; the discharge valve closes due to the
negative pressure in the dosing head and fresh
feed chemical flows through the suction valve
into the dosing head. One cycle is completed.
14